diff --git a/docs/supported_ops.md b/docs/supported_ops.md
index 839b6dfaccd..601c9db995b 100644
--- a/docs/supported_ops.md
+++ b/docs/supported_ops.md
@@ -1894,7 +1894,7 @@ are limited.
 <td>S</td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -1915,7 +1915,7 @@ are limited.
 <td>S</td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -3333,7 +3333,7 @@ are limited.
 <td>S</td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -6061,7 +6061,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -6082,7 +6082,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -7162,7 +7162,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -7183,7 +7183,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -7294,7 +7294,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -7315,7 +7315,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -8826,7 +8826,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -8847,7 +8847,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -8958,7 +8958,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -8979,7 +8979,7 @@ are limited.
 <td><b>NS</b></td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
@@ -9142,7 +9142,7 @@ are limited.
 <td>S</td>
 <td>S</td>
 <td><em>PS<br/>UTC is only supported TZ for TIMESTAMP</em></td>
-<td><b>NS</b></td>
+<td>S</td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
 <td><b>NS</b></td>
diff --git a/integration_tests/src/main/python/ast_test.py b/integration_tests/src/main/python/ast_test.py
index 625478ba094..e228712b7a4 100644
--- a/integration_tests/src/main/python/ast_test.py
+++ b/integration_tests/src/main/python/ast_test.py
@@ -32,7 +32,6 @@
 ast_arithmetic_descrs = ast_integral_descrs + [(float_gen, True), (double_gen, True)]
 
 # cudf AST cannot support comparing floating point until it is expressive enough to handle NaNs
-# cudf AST does not support strings yet
 ast_comparable_descrs = [
     (boolean_gen, True),
     (byte_gen, True),
@@ -43,7 +42,7 @@
     (double_gen, False),
     (timestamp_gen, True),
     (date_gen, True),
-    (string_gen, False)
+    (string_gen, True)
 ]
 
 ast_boolean_descr = [(boolean_gen, True)]
diff --git a/integration_tests/src/main/python/join_test.py b/integration_tests/src/main/python/join_test.py
index 70a1aabfdae..d6d08015acf 100644
--- a/integration_tests/src/main/python/join_test.py
+++ b/integration_tests/src/main/python/join_test.py
@@ -60,13 +60,13 @@
 
 # data types supported by AST expressions in joins
 join_ast_gen = [
-    boolean_gen, byte_gen, short_gen, int_gen, long_gen, date_gen, timestamp_gen
+    boolean_gen, byte_gen, short_gen, int_gen, long_gen, date_gen, timestamp_gen, string_gen
 ]
 
 # data types not supported by AST expressions in joins
 join_no_ast_gen = [
     pytest.param(FloatGen(), marks=[incompat]), pytest.param(DoubleGen(), marks=[incompat]),
-    string_gen, null_gen, decimal_gen_64bit
+    null_gen, decimal_gen_64bit
 ]
 
 # Types to use when running joins on small batches. Small batch joins can take a long time
diff --git a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/TypeChecks.scala b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/TypeChecks.scala
index 77cd8cee7fa..517b15d9912 100644
--- a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/TypeChecks.scala
+++ b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/TypeChecks.scala
@@ -750,7 +750,7 @@ object TypeSig {
     (commonCudfTypes + BINARY + DECIMAL_64 + NULL + ARRAY + MAP).nested() + STRUCT
 
   /** All types that can appear in AST expressions */
-  val astTypes: TypeSig = BOOLEAN + integral + fp + TIMESTAMP + DATE
+  val astTypes: TypeSig = BOOLEAN + integral + fp + TIMESTAMP + DATE + STRING
 
   /** All AST types that work for comparisons */
   val comparisonAstTypes: TypeSig = astTypes - fp
diff --git a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/literals.scala b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/literals.scala
index c9ea352cdd6..1bcdc58c612 100644
--- a/sql-plugin/src/main/scala/com/nvidia/spark/rapids/literals.scala
+++ b/sql-plugin/src/main/scala/com/nvidia/spark/rapids/literals.scala
@@ -734,6 +734,7 @@ case class GpuLiteral (value: Any, dataType: DataType) extends GpuLeafExpression
       case LongType => ast.Literal.ofLong(value.asInstanceOf[java.lang.Long])
       case FloatType => ast.Literal.ofFloat(value.asInstanceOf[java.lang.Float])
       case DoubleType => ast.Literal.ofDouble(value.asInstanceOf[java.lang.Double])
+      case StringType => ast.Literal.ofString(value.asInstanceOf[UTF8String].toString)
       case TimestampType =>
         ast.Literal.ofTimestampFromLong(DType.TIMESTAMP_MICROSECONDS,
           value.asInstanceOf[java.lang.Long])
diff --git a/tools/generated_files/supportedExprs.csv b/tools/generated_files/supportedExprs.csv
index f57e384a25d..14b2f8f784d 100644
--- a/tools/generated_files/supportedExprs.csv
+++ b/tools/generated_files/supportedExprs.csv
@@ -19,8 +19,8 @@ Add,S,`+`,None,AST,rhs,NA,NS,NS,S,S,S,S,NA,NA,NA,NS,NA,NA,NS,NA,NA,NA,NA
 Add,S,`+`,None,AST,result,NA,NS,NS,S,S,S,S,NA,NA,NA,NS,NA,NA,NS,NA,NA,NA,NA
 Alias,S, ,None,project,input,S,S,S,S,S,S,S,S,PS,S,S,S,S,NS,PS,PS,PS,NS
 Alias,S, ,None,project,result,S,S,S,S,S,S,S,S,PS,S,S,S,S,NS,PS,PS,PS,NS
-Alias,S, ,None,AST,input,S,S,S,S,S,S,S,S,PS,NS,NS,NS,NS,NS,NS,NS,NS,NS
-Alias,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,NS,NS,NS,NS,NS,NS,NS,NS,NS
+Alias,S, ,None,AST,input,S,S,S,S,S,S,S,S,PS,S,NS,NS,NS,NS,NS,NS,NS,NS
+Alias,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,S,NS,NS,NS,NS,NS,NS,NS,NS
 And,S,`and`,None,project,lhs,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 And,S,`and`,None,project,rhs,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 And,S,`and`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
@@ -79,7 +79,7 @@ Atanh,S,`atanh`,None,project,result,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,
 Atanh,S,`atanh`,None,AST,input,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Atanh,S,`atanh`,None,AST,result,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 AttributeReference,S, ,None,project,result,S,S,S,S,S,S,S,S,PS,S,S,S,S,NS,PS,PS,PS,NS
-AttributeReference,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,NS,NS,NS,NS,NS,NS,NS,NS,NS
+AttributeReference,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,S,NS,NS,NS,NS,NS,NS,NS,NS
 BRound,S,`bround`,None,project,value,NA,S,S,S,S,PS,PS,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA
 BRound,S,`bround`,None,project,scale,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 BRound,S,`bround`,None,project,result,NA,S,S,S,S,S,S,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA
@@ -191,8 +191,8 @@ EqualNullSafe,S,`<=>`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,
 EqualTo,S,`=`; `==`,None,project,lhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 EqualTo,S,`=`; `==`,None,project,rhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 EqualTo,S,`=`; `==`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
-EqualTo,S,`=`; `==`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
-EqualTo,S,`=`; `==`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
+EqualTo,S,`=`; `==`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
+EqualTo,S,`=`; `==`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
 EqualTo,S,`=`; `==`,None,AST,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Exp,S,`exp`,None,project,input,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Exp,S,`exp`,None,project,result,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
@@ -236,14 +236,14 @@ GetTimestamp,S, ,None,project,result,NA,NA,NA,NA,NA,NA,NA,NA,PS,NA,NA,NA,NA,NA,N
 GreaterThan,S,`>`,None,project,lhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 GreaterThan,S,`>`,None,project,rhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 GreaterThan,S,`>`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
-GreaterThan,S,`>`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
-GreaterThan,S,`>`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
+GreaterThan,S,`>`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
+GreaterThan,S,`>`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
 GreaterThan,S,`>`,None,AST,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 GreaterThanOrEqual,S,`>=`,None,project,lhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 GreaterThanOrEqual,S,`>=`,None,project,rhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 GreaterThanOrEqual,S,`>=`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
-GreaterThanOrEqual,S,`>=`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
-GreaterThanOrEqual,S,`>=`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
+GreaterThanOrEqual,S,`>=`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
+GreaterThanOrEqual,S,`>=`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
 GreaterThanOrEqual,S,`>=`,None,AST,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Greatest,S,`greatest`,None,project,param,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,NS,NS
 Greatest,S,`greatest`,None,project,result,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,NS,NS
@@ -304,20 +304,20 @@ Length,S,`length`; `character_length`; `char_length`,None,project,result,NA,NA,N
 LessThan,S,`<`,None,project,lhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 LessThan,S,`<`,None,project,rhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 LessThan,S,`<`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
-LessThan,S,`<`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
-LessThan,S,`<`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
+LessThan,S,`<`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
+LessThan,S,`<`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
 LessThan,S,`<`,None,AST,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 LessThanOrEqual,S,`<=`,None,project,lhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 LessThanOrEqual,S,`<=`,None,project,rhs,S,S,S,S,S,S,S,S,PS,S,S,S,NS,NS,NS,NA,PS,NS
 LessThanOrEqual,S,`<=`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
-LessThanOrEqual,S,`<=`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
-LessThanOrEqual,S,`<=`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,NS,NS,NS,NS,NS,NS,NA,NS,NS
+LessThanOrEqual,S,`<=`,None,AST,lhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
+LessThanOrEqual,S,`<=`,None,AST,rhs,S,S,S,S,S,NS,NS,S,PS,S,NS,NS,NS,NS,NS,NA,NS,NS
 LessThanOrEqual,S,`<=`,None,AST,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Like,S,`like`,None,project,src,NA,NA,NA,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA
 Like,S,`like`,None,project,search,NA,NA,NA,NA,NA,NA,NA,NA,NA,PS,NA,NA,NA,NA,NA,NA,NA,NA
 Like,S,`like`,None,project,result,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Literal,S, ,None,project,result,S,S,S,S,S,S,S,S,PS,S,S,S,S,S,PS,PS,PS,NS
-Literal,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,NS,NS,NS,NS,NS,NS,NS,NS,NS
+Literal,S, ,None,AST,result,S,S,S,S,S,S,S,S,PS,S,NS,NS,NS,NS,NS,NS,NS,NS
 Log,S,`ln`,None,project,input,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Log,S,`ln`,None,project,result,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA
 Log10,S,`log10`,None,project,input,NA,NA,NA,NA,NA,NA,S,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA